Tools / Developer Tools
9 toolsDeveloper Tools
Format, encode, hash and convert data without installing anything.
All 9 developer tools
Unix Timestamp Converter New
Epoch to date and date to epoch, in bulk, with time zones.
DEVJWT Decoder New
Decode JSON Web Tokens and check expiry, all inside your browser.
DEVHTML Encode / Decode New
Escape and unescape HTML entities, named or numeric.
DEVJSON Formatter New
Beautify, minify, validate and convert JSON with exact error line and column.
DEVUUID Generator New
Bulk v4, v7, v5 and v1 UUIDs and GUIDs in any format, plus a UUID decoder.
DEVHash Generator New
MD5, SHA-256, SHA-512, bcrypt, NTLM, HMAC, SRI and file hashes in bulk.
DEVBase64 Decode & Encode New
Decode Base64 to text, image, PDF, hex or file. Encode text and files.
DEVURL Decode & Encode New
Decode or percent-encode URLs and query strings in bulk, with a URL parser.
DEVCSV to JSON Converter New
CSV or TSV to JSON, NDJSON or keyed objects, and JSON back to CSV.
About our developer tools
Everyday developer utilities for working with JSON, CSV, Base64, URL encoding, hashes and UUIDs. Every tool runs the conversion on our server with PHP's own standard functions, json_decode, base64_encode, hash(), random_bytes, so the output matches what your own code would produce.
Why server-side developer tools?
Many online formatters run a JavaScript library in your browser that behaves slightly differently from the language you actually deploy. BulkMaker runs PHP's native implementations, which follow the same RFCs (RFC 8259 for JSON, RFC 4648 for Base64, RFC 3986 for URL encoding, RFC 4122 for UUIDs) that every mainstream language implements.
Bulk by default
Each developer tool accepts many values at once, one per line, so you can hash a column of IDs, decode a list of Base64 strings, or generate 500 UUIDs in one go instead of pasting them one at a time.
Privacy and secrets
Input is processed in memory for a single request and never written to disk or a database. Even so, avoid pasting production secrets, private keys or live passwords into any online tool, rotate any credential that has been pasted somewhere you do not control.